A regressing spindle cell tumour of Reed.

Tso S, et al. BMJ Case Rep 2017. doi:10.1136/bcr-2017-222002 Description Spindle cell tumour of Reed is a benign melanocytic naevus which usually presents as a deeply pigmented mole. It is more commonly found on the lower extremities of young girls. It is an uncommon naevus but its incidence and prevalence are not known. A Reed naevus typically goes through a rapid initial growth phrase before stabilising in size and then regresses over time. Awareness of Reed naevus has been demonstrated to be low, even among dermatology doctors. The main dermoscopic patterns (when observed under magnification using a dermatoscope) observed are the starburst pattern (50.6% of cases), pattern of dotted vessels (19.3%), globular pattern (17%) and atypical pattern (9.0%). Figure 1A illustrates a 7 mmx5 mm symmetrical deeply pigmented plaque on the right knee of a 5-year-old girl. Figure 1B shows the dermatoscopic symmetrical starburst pattern with regular pigment network. The size and the extent of pigmentation of the Reed naevus regressed over a 2-year observation period and almost disappeared as shown in the photograph (figure 2A,B).